I have yet to see an instance where taxes are higher because the property is rented vs owned. Where did you see the 3x figure @James Webb ? Are you working with an agent? They should be able to confirm that this won't be the case for you.
I am in the same boat. When I rented my condo, it jumped from $600/yr to $1,800/yr (exactly 3x). Now I was thinking to rent my current property which is $5,500/yr as a primary residence. How I am supposed to write off $15,000/yr if I rent that one??? No idea.